Seventy more modular homes have been approved for Dublin.
The two- and three-bedroom rapid-build properties will be built in Cherry Orchard, Ballyfermot and Finglas.
They can be delivered faster than bricks-and-mortar homes because they do not need to fulfil strict planning laws.
They are aimed at tackling the homeless crisis by taking families out of emergency hotel accommodation.
Of the 506 rapid build homes planned for the city, just 22 in Ballymun have been built so far.
Work is continuing on 130 others, which are due to be completed in the autumn.
However, Threshold's John Mark McCafferty says the Government needs to start building permanent social housing homes also.
“Rapid build in itself won’t solve the housing crisis,” he said.
“It certainly will make a significant contribution to the supply of social housing but what is required is broader provision of social housing, not only rapid build.”